I understand that the Ubuntu 14.04.5 OS in your system is not detecting your SSD.

You mentioned that you tested the SSD using Ubuntu 16.04.3 and didn’t experience any issues, did you checked the firmware version of the SSD? Is it possible for you to perform a firmware update (SCV10111), using the Intel® SSD Data Center Tool (https://downloadcenter.intel.com/download/27497?v=t), on one of the validated operating systems?

I was wondering if you have any updates. Could you check the previous message?

In addition to what was previously mentioned, I would also like to point out that since Intel® DC SSDs are designed with a server environment in mind (OS included), the tested and validated Linux* operating systems for your specific SSD are the following:

Red Hat* Enterprise Linux* 6.5, 6.7, 7.1, and 7.2

SUSE* Linux* Enterprise Server 11 SP4, 12 SP1

CentOS* 64bit 6.3, 6.5, and 7.0

In case you consider that you need further assistance, don’t hesitate to contact us.Regards,Andres V.